#include<bits/stdc++.h>
#define ONLINE_JUDGE
#define ll long long
#define ull unsigned long long
using namespace std;

const ll N = 1e6 + 10, INF = 0x3f3f3f3f;

ll n, m;

void solve()
{
    cin >> n>>m;
    ll x, sum = 0;
    for (ll i = 1;i <= n;i++) {
        cin >> x;
        sum += x;
    }
    if (sum <= m) cout << "Yes\n";
    else cout << "No\n";
}

signed main()
{
    // ios::sync_with_stdio(0);
    // cin.tie(0);cout.tie(0);
#ifndef ONLINE_JUDGE
    std::istringstream in(R"()");
    std::cin.rdbuf(in.rdbuf());
#endif
    ll T = 1;
    //cin>>T;
    for (ll i = 1;i <= T;i++) {
        solve();
    }
}